Electrochromic display dot drive matrix
First Claim
1. A planar matrix of electrochromic display dot drive picture elements, wherein:
- a) each picture element comprises;
1) a drive transistori) connected between a planar drive electrode, common to all picture elements, and the display dot andii) connected for turning on in response to the application of a turn-on voltage to a control terminal, and for turning off in response to the application of a turn-off voltage to the control terminal;
2) a capacitor connected between the drive electrode and the control terminal;
3) a planar counter electrode common to all picture elements, connected to the drive electrode through an electric power source; and
4) means for selectively connecting the control terminal and capacitor to, or insulating them from, a turn-on/turn-off voltage source;
b) the display dot and the counter electrode are so situated and constructed that, when the drive transistor is turned on, it impresses the display dot with electricity from the electric power source sufficient to change the color of the display dot; and
c) the display dots are situated to be simultaneously viewed by an observer off the plane of the matrix.
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Accused Products
Abstract
A planar matrix of display picture elements is operated by supplying power to the picture elements by a high current planar drive electrode connected to the picture elements, and a planar counter electrode slightly separated from the picture elements'"'"' display dots, and by addressing the picture elements with low current leads parallel to the plane of the matrix. The planes of the electrodes are parallel to the plane of the matrix. The elimination of high current power leads improves response time and resolution. The separation of the counter electrode from the display dots eliminates the need to refresh the picture elements. An isolation transistor in series with the drive transistor allows simultaneous color change of the entire matrix by simultaneous turning on and off of all isolation transistors.
23 Citations
10 Claims
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1. A planar matrix of electrochromic display dot drive picture elements, wherein:
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a) each picture element comprises; 1) a drive transistor i) connected between a planar drive electrode, common to all picture elements, and the display dot and ii) connected for turning on in response to the application of a turn-on voltage to a control terminal, and for turning off in response to the application of a turn-off voltage to the control terminal; 2) a capacitor connected between the drive electrode and the control terminal; 3) a planar counter electrode common to all picture elements, connected to the drive electrode through an electric power source; and 4) means for selectively connecting the control terminal and capacitor to, or insulating them from, a turn-on/turn-off voltage source; b) the display dot and the counter electrode are so situated and constructed that, when the drive transistor is turned on, it impresses the display dot with electricity from the electric power source sufficient to change the color of the display dot; and c) the display dots are situated to be simultaneously viewed by an observer off the plane of the matrix. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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Specification